First,Hiroshima,japan
2, Nagasaki
Large buildings with barreled shaped roofs covered in bark made by Native Americans and other peoples across the world were considered "longhouses" in the Americas. These longhouses were permanent structures that housed many families of the same clan in a singular building.
1) They mostly spread Islam through conquering new countries. What they did also was unite all people under a single rule and ended religious uprisings.
2) There was tensions because one faction believed that Muhammad should be succeeded by someone chosen by people, while the other faction believed that his successor should be someone from his bloodline.
